This started happening when I was installing apps from Cydia while connected to my computer, and the Sync In Progress screen kept popping up. After I disconnected my iPod from my computer, I noticed that my lockscreen (MultiBarLockscreen) looked like it was missing some things, so I rebooted it using SBSettings. My iPod is now stuck at the boot logo and won't boot up. After about ten minutes, a white screen flashes up and the iPod resets itself, starting the boot process all over again. I want to fix this problem without doing a full restore so I don't lose all my stuff. What should I do? Thanks.